333 North American Cijpcracea. 



1-3. SciRPUs (Trichophorum) lineatus, Michx. 



Culm triangular; umbels terminal and lateral, decompound, 

 at length nodding ; involucre 1 — 2-leaved, shorter than the 

 umbels; spikes oblong, pedunculate; scales ovate, acuminate, 

 somewhat patulous at the tip, carinate. 



S. lineatus, Michx.! fl. 1. p. 32; ValiU cnum. 2. p. 73; Pursh,fl. 1. 

 p. 56 ; EUioU, sh 1. p. 87 ; Torr. fl.. 1. p. 51. 

 S. pendulus, Muhl.! gram. p. 41. 



S. biizoides, Willd. (fide Muhl.) ; Schull. mant. 2. p. 84. 

 Trichophorum lineatum, Pers. syn. 1. p. 69; Beck ! hot. p. 427. 

 Isolepia lineata, Ram. Sf Schult. syst. 2. p. 117. 



Culm 1 — 2\ feet high, very leafy, distinctly triangular. Leaves 2 — 4 

 lines wide, flat, scabrous on the margin ; sheaths open at the throat, 

 several of the upper ones bearing umbels. Terminal iimhel somewhat 

 paniculate, loose, at first erect, but at length more or less pendulous, 

 twice or thrice compound ; lateral umbels much smaller, sometimes 

 wanting ; ultimate divisions 3 — 6 lines long. Involucre of one principal 

 leaf, which is shorter than the umbel. Spikes 3 — 4 lines in length, 

 oblong, or ovate -oblong. Scales loosely imbricated at the tip so as to 

 appear sometimes squarrose, ferruginous, with a very distinct and rather 

 prominent keel. Bristles very slender, smooth, crisped and entangled, 

 projecting a little bej'ond the scale in the mature spike. Stamens 3. 

 Style somewhat unequally 3-cleft, smooth. Nut obovate, acuminate, 

 obtusely angular in front, flat on the back, minutely papillose, pale brown 

 when ripe. 



Hab. Boggy places. Plainfield, Massachusetts, Dr.Po7-ter!; 

 near Poughkeepsie, New York, Mr. Dudgeon ! ; near Fort 

 Gratiot, Michigan Territory, Dr. Pitcher! ; Banks of the 

 Ohio, Dr. Baldwin! ; Kentucky, Dr. Short! ; Pennsylvania, 

 Muhlenberg! ; New Orleans, Dr. Ingalls! ; South Carolina, 

 Elliott; Texas, T. Drummond! 



Obs. Pursh's specimens of Scirpus lineatus in Lambert's 

 Herbarium agrees exactly with the plant here described, and 

 yet he states that it is destitute of bristles ; in consequence of 

 which remark Roemer and Schultes, in their Systema Vegetabi- 

 lium, have removed it to the genus Isolepis. Afterwards, as if 



